the.com/mushroom cloud

physics doodling a fungus the size of regret in the sky

means The towering, mushroom-shaped column of smoke, debris, and condensed vapor that rises after a very large explosion, most infamously a nuclear detonation.

from A plain compound: "mushroom," the cap-and-stalk fungus (from Old French "mousseron," possibly tied to "mousse," moss), wedded to "cloud." The shape-comparison long predates the bomb — observers described volcanic and large blast clouds as mushroom-like in the 1800s — but the phrase fused permanently into the language after 1945, when the Trinity test and Hiroshima and Nagasaki gave the world an image it would never unsee.

why mushroom
hot gas rises, cools, curls back into a cap
first witness
Trinity test lit New Mexico like a second sun
the stem
updraft sucks dust and debris skyward for miles
not exclusive
big volcanoes and meteor strikes make them too
color tell
reddish from nitrogen oxides cooking in the heat
for instance

hiroshima bombing — august 6, 1945: atomic bomb created iconic mushroom cloud over japan, killing ~70,000 people instantly

bikini atoll test — operation crossroads, july 1946: us nuclear test created massive mushroom cloud visible 40 miles away

tsar bomba detonation — october 30, 1961: soviet union's largest nuclear weapon test, mushroom cloud reached 64km altitude over arctic

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